20199164 has 12 divisors (see below), whose sum is σ = 36170904. Its totient is φ = 9864624.

The previous prime is 20199161. The next prime is 20199191. The reversal of 20199164 is 46199102.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 20199164.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20199161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58547 + ... + 58890.

It is an arithmetic number, because the mean of its divisors is an integer number (3014242).

Almost surely, 2^20199164 is an apocalyptic number.

It is an amenable number.

20199164 is a deficient number, since it is larger than the sum of its proper divisors (15971740).

20199164 is a wasteful number, since it uses less digits than its factorization.

20199164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117484 (or 117482 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 20199164 is about 4494.3480061072. The cubic root of 20199164 is about 272.3398110222.

The spelling of 20199164 in words is "twenty million, one hundred ninety-nine thousand, one hundred sixty-four".